Method for estimating an electrical operating time of a circuit breaker
a circuit breaker and operating time technology, applied in the field of point on wave controllers, can solve the problems of charging current, inability to accurately detect current within the tolerance range of the current sensor and the sensing accuracy required, and stress in the circuit breaker as well as the connected power system components
Active Publication Date: 2019-10-08
HITACHI ENERGY LTD
View PDF7 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This approach allows for accurate determination of electrical operating times and switching instances, minimizing electrical disturbances and mechanical shocks, and ensuring reliable operation in systems with challenging load characteristics.
Problems solved by technology
During this process, the active elements of the circuit breaker either interrupt or incept high current, causing stresses in the circuit breaker as well as the connected power system components.
However, for certain types of loads, such as inductive loads (transformers) or capacitive loads (transmission lines), the charging current is often of such small magnitudes that they cannot be accurately detected within the tolerance range of the current sensor and sensing accuracy required.
Therefore, for such loads, current feedback based detection of switching instance cannot be applied.
However, this voltage feedback approach is not applicable in scenarios where the load is already at a potential induced by electrostatic or electrodynamic means through a neighboring electrical element.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023]In the following detailed description, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific embodiments, which may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments, and it is to be understood that other embodiments may be utilized and that logical, mechanical, electrical and other changes may be made without departing from the scope of the embodiments. The following detailed description is, therefore, not to be taken in a limiting sense.
[0024]FIG. 1 illustrates a multiphase electrical system 100. The multiphase electrical system 100 includes a power source (represented in figure as a bus 110). The power source 110 can be connected to an electrical subsystem or load 160 through a circuit breaker 140. The circuit breaker can perform a closing operation to establish electrical connection between the power source 110 and the subs...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a method of determining an electrical operating time of a circuit breaker (140) in a multiphase electrical system having a subsystem (160) at an electric potential resulting from electrical characteristics of electrical components within the subsystem. The method comprises monitoring (145) the voltage of the subsystem in the first phase, determining a first rate of change from the monitored voltage in the first phase, detecting at least one instance of switching based on the first rate of change, determining an electrical operating time of the circuit breaker based on the detected at least one instance of switching and an instance at which a command for switching was provided to the circuit breaker.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a U.S. national stage of International Application Serial No. PCT / IB2015 / 059213, filed Nov. 30, 2015, which claims priority to Indian Patent Application No. 5993 / CHE / 2014, filed Nov. 30, 2014. The entire disclosures of both of the foregoing applications are hereby incorporated by reference.FIELD OF THE INVENTION[0002]The present invention relates to point on wave controllers. More particularly, the present invention relates to point on wave controllers employed for loads at electric potential due to electrical characteristics of the load.BACKGROUND[0003]In power systems, circuit breakers are used for connecting and disconnecting a load. During this process, the active elements of the circuit breaker either interrupt or incept high current, causing stresses in the circuit breaker as well as the connected power system components. The flow of the high current can be limited by closing and opening the circuit breaker at a ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(United States)
IPC IPC(8): H01H9/56G04F10/10H01H33/59H03K17/16H03K17/28H03K17/13
CPCH01H9/56G04F10/10H03K17/16H03K17/28H01H33/593H01H9/563H03K17/13H01H2009/566
Inventor TALLURI, ANILPARAPURATH, ANOOPRADHAKRISHNAN, RAHUL
Owner HITACHI ENERGY LTD